Driving method of organic electroluminescence emission part

1. A display device comprising a plurality of pixels, each of the pixels including:

a driving transistor; a sampling transistor; and

a display element,

wherein the driving transistor including a first current node and a second current node, respectively coupled to a power supply line and the display element, so as to control a current from the power supply line to the display element,

and the sampling transistor is connected to a signal line so as to sample an image data,

wherein, during display of image frames in a plurality of frame periods, after a light emitting period of a given frame period begins and before a light emitting period of a next frame period begins, each of the pixels is driven such that:

(i) a potential of an anode electrode of the display element is set by applying a predetermined intermediate voltage to the anode electrode so that a potential difference between the anode electrode and a cathode electrode of the display element does not exceed a threshold voltage of the display element; then,

(ii) the display element is kept in non-emission state and an anode initializing voltage is applied to the anode electrode from the power supply line to the first current node of the driving transistor, and

wherein the predetermined intermediate voltage is higher than the anode initializing voltage, which is a voltage low enough to stop light emission of the display element and which is applied to the anode electrode to initialize the anode electrode between light emission periods, and the predetermined intermediate voltage is lower than a drive voltage which is a voltage that produces light emission in the display element.

2. The display device according to claim 1 , wherein the driving transistor is directly electrically connected between the power supply line and the display element.

3. The display device according to claim 1 , wherein each of the pixels further includes a switch transistor connected between the anode electrode and a potential line, the potential line being independent of the signal line.

4. The display device according to claim 3 , wherein the potential line and the switch transistor are configured to contribute to applying the predetermined intermediate voltage to the anode electrode.

5. The display device according to claim 4 , wherein the potential line is configured to alternatively provide the predetermined intermediate voltage and the anode initializing voltage via the switch transistor.

6. The display device according to claim 2 , the power supply line is configured to contribute to applying the predetermined intermediate voltage to the anode electrode.

7. The display device according to claim 6 , wherein the power supply line is configured to alternatively provide the predetermined intermediate voltage and the anode initializing voltage via the driving transistor.

8. The display device according to claim 1 , wherein the display element is an organic EL element.

9. A display device comprising a plurality of pixels, at least one of the pixels including a driving transistor, a sampling transistor, a switch transistor and a display element,

the drive transistor is coupled between a power supply line and an anode electrode of the display element so as to control a current supplied to the display element;

the sampling transistor is connected to a signal line so as to sample an image data; and

the switch transistor is connected between the anode electrode and a potential line, the potential line being independent of the signal line,

wherein the pixel is driven such that:

after a light emission period, by setting the switch transistor in a conductive state, a potential of the anode electrode is set to an intermediate potential that is applied to the anode electrode from a power supply line;

then, the current supplied from the drive transistor to the display element is being cut-off, and a low potential is supplied to the anode electrode via the switch transistor, the low potential being lower than the intermediate potential.

10. The display device according to claim 9 , wherein the display element is an organic EL element.

11. The display device according to claim 9 , wherein the switch transistor is directly electrically connected between the anode electrode and a potential line.

12. The display device according to claim 9 ,

wherein the intermediate potential is higher than the low potential which is a potential low enough to stop light emission of the display element,

and the intermediate potential is lower than a drive potential which is a potential that produces light emission in the display element.

13. The display device according to claim 12 ,

wherein the intermediate potential is a potential for making a potential difference between the anode electrode and the cathode electrode of the display element to a value which is not higher than a threshold voltage of the display element.

14. The display device according to claim 9 , wherein the potential line is configured to alternatively provide the intermediate potential and the low potential.

15. A light emitting device comprising:

a driving transistor and a light emitting element,

wherein the driving transistor including a first current node and a second current node, respectively coupled to a power supply line and the light emitting element, so as to control a current from the power supply line to the light emitting element,

wherein between a first light emission period and a second light emission period for the light emitting element, the light emitting device is driven such that:

(i) a potential of an anode electrode of the light emitting element is set by applying a predetermined intermediate voltage to the anode electrode so that a potential difference between the anode electrode and a cathode electrode of the light emitting element does not exceed a threshold voltage of the light emitting element; then,

(ii) the light emitting element is kept in non-emission state and an anode initializing voltage is applied to the anode electrode from the power supply line to the first current node of the driving transistor, and

wherein the predetermined intermediate voltage is higher than the anode initializing voltage, which is a voltage low enough to stop light emission of the light emitting element and which is applied to the anode electrode to initialize the anode electrode between the first and the second light emission periods, and the predetermined intermediate voltage is lower than a drive voltage which is a voltage that produces light emission of the light emitting element.

16. The display device according to claim 15 , the power supply line is configured to contribute to applying the predetermined intermediate voltage to the anode electrode.

17. The display device according to claim 16 , wherein the power supply line is configured to alternatively provide the predetermined intermediate potential and the anode initializing voltage via the driving transistor.

18. The display device according to claim 15 , wherein the light emitting element is an organic EL element.